g the dc per-phase resistance is 14.5 ohms. the ac resistance is 1.5 times the dc value. calculate the per-phase synchronous impedance and per-phase reactance for the alternator. the synchronous impedance is to be calculated from the ratio of per-phase v (rated voltage, 208) to ia (short circuit) at the if required to produce rated v (208 volts) under open-circuit conditions.